Sperm Longevity and Motility in Ringer’s Lactate Solution with Addition of Egg Yolk among Five Phenotypes of Kokok Balenggek Chicken

The application of cryopreservation to preserve germplasm in such specific breed requires preliminary studies, primarily related to the resistance of spermatozoa to low temperatures (4 – 5 °C) as measured by their motility and longevity. In this study, semen taken from five phenotypes of Kokok Balengeek Chicken (KBC) (Biriang, Jalak, Kinantan, Kuriak, and Taduang) was used to evaluate the effect of Ringer’s Lactate-egg yolk diluent on longevity and motility of spermatozoa. The treatments consisted of Ringer’s Lactate (RL) solution added with egg yolk at a concentration of 1% (RLKT1), 3% (RLKT3), and 5% (RLKT5). Evaluation of fresh semen showed that the spermatozoa of Jalak had the highest motility, namely 75.63 ± 0.5% (P<0.05). Post-dilution longevity and motility observations were carried out at 0, 24, 48, and 72 h, significantly decreasing each time (P